U.S. Army, Royal Australian Navy, U.S. Coast Guard and U.S. Navy military divers swim along concrete piles during a pier maintenance training mission during Rim of the Pacific Exercise, July 13, 2016. The world's largest international maritime exercise, RIMPAC provides a unique training opportunity that helps participants foster and sustain the cooperative relationships that are critical to ensuring the safety of sea lanes and security on the world's oceans.
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